What is Stormwater
Stormwater runoff is rainwater or melted snow that runs off streets, lawns and other surfaces. Stormwater runoff soaks into the ground through infiltration or discharges into lakes, rivers and streams. This water picks up pollutants such as bacteria, pesticides, fertilizers, oils, salt, trash and other pollutants. Stormwater pollution can cause damage to our natural water resources such as wetlands, lakes, rivers, and streams.
Why Manage Stormwater
Clean water is necessary for drinking, swimming, fishing and protecting wildlife. Keeping stormwater clean is not only a benefit to our community, but it benefits the entire network of water bodies and land which make up our watershed.
MS4 Permit
To prevent pollution and protect these natural resources the City owns and operates the municipal separate storm sewer system (MS4) subject to regulation under the National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS) MS4 permit.
A Stormwater Pollution Prevention Plan (SWPPP) outlines the activities that the City undertakes as part of this permit.
If you have questions or would like to provide any input on the City of Corcoran’s Stormwater program, please contact the City Engineering Development Superintendent, Lauren Letsche, at [email protected]
2020 MS4 Annual Report
MS4 Permit and Stormwater Prevention Plan
City of Corcoran National Pollutant Discharge Elimination System (NPDES) MS4 Phase 2 Permit and Stormwater Pollution Prevention Plan
2021 MS4 Permit City of Corcoran - Part 1
2021 MS4 SWPPP Permit City of Corcoran - Part 2
Report Illicit Discharge
Only stormwater should enter the storm sewer system. City code outlined in Chapter 50 STORM WATER ILLICIT DISCHARGE AND ILLICIT CONNECTIONS TO THE STORM SEWER SYSTEM prohibits non stormwater discharges entering the City’s municipal separate storm sewer system (MS4).
Spills that must be reported:
• Gasoline, oil, paint, grease and other hazardous material
• Leaks and overflows from sanitary sewer lines
• Grass clippings, leaves and other yard waste that are swept or dumped
• Waste from car washing, carpet cleaning, etc.
• Wastewater from manufacturing or other industrial processes that is not properly treated
Reportable spills should be directed to the City of Corcoran’s IDDE Complaint Form or to the City Engineering Development Superintendent, Lauren Letsche, at [email protected]. If spill appears potentially hazardous, flammable, or toxic call 911 immediately.
Report Erosion Sediment Control Violation
Erosion and sediment control is essential to preventing pollutants and soil from leaving the site and entering the storm system or waterbodies. Our inspection staff oversees construction site erosion and sediment control practices throughout the city. As outlined in City Code Chapter 54 LAND DISTURBANCE AND EROSION AND SEDIMENT CONTROL prohibits uncontrolled land disturbing activity at construction sites.
Examples of typical erosion and sediment control violations
• Missing stabilization on sites inactive for more than 7 days
• Knocked down or missing silt fence around perimeter of exposed soils
• Stockpiles of material with no perimeter control
• Sediment tracking or washout into street
• Missing inlet protection
If you suspect that a site may not be covered by a permit or erosion control measures are failing or not implemented. Please complete the City of Corcoran’s ESC Complaint Form or contact the City Engineering Development Superintendent, Lauren Letsche, at [email protected].